def get_data(df,x_c,y_c):
    # if isinstance(y_c,str):
    x=x_c+[y_c]
    # else:
    #     x = x_c + y_c
    d=df[x].dropna()
    x=d[x_c]
    y=d[y_c]
    return x.to_numpy(),y.to_numpy()
